Study of the structure of carbon matrices for radionuclide encapsulation by small-angle neutron scattering |
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Authors: | V M Lebedev V T Lebedev D N Orlova V I Tikhonov |
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Institution: | 1. Petersburg Nuclear Physics Institute, Leningradskaya oblast, Gatchina, 188300, Russia 2. National Research Centre Kurchatov Institute, Moscow, 123182, Russia
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Abstract: | The structure of carbon matrices prepared from diphtalocyanines using pyrolysis to encapsulate metal atoms (Y, Sm, U) inside small pores is studied by small-angle neutron scattering. It is shown that the structure of the porous matrix at a scale of 100–102 nm is characterized by two levels — small pores with the characteristic radii of 3–7 nm aggregated into entities with sizes of 40–100 nm and higher. The scattering data fit the values of the sample density and the total volume of pores in the matrices. |
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